A350 kg mass, constrained to move only vertically, is supported by two springs, each having a spring constant of 250 kn/m. a periodic force with a maximum value of 100 n is applied to the mass with a frequency of 2.5 rad/s. given a damping factor of 0.125, the amplitude of the vibration is

The lid of a pressure cooker forms a nearly airtight seal. steam builds up pressure and increases temperature within the pressure cooker so that food cooks faster than it does in an ordinary pot. the system is defined as the pressure cooker and the water and steam within it. if 2.0 g of water is sealed in a pressure cooker and then vaporized by heating, and 5127 j must be added as heat to completely vaporize the water, what is the change in the system’s internal energy? answer in units of j.